Endoscope system provided with low-pass filter for moire removal
US6025873A · kind A · utility
95Cited by
10References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 26, 1997 |
| Grant date | Feb 15, 2000 |
| Priority date | — |
| Expiry date | Aug 26, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/134
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An endoscope system including a first hard endoscope which uses a relay lens as an image transmission optical system, a second hard endoscope which uses an image guide formed by a fiber bundle, and a TV camera which is mountable respectively on the first and second hard endoscopes and which is rotatable. The TV camera has built therein a CCD. An optical low-pass filter for removing moire even in case of being rotated is provided on an ocular part of the second hard endoscope.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.